Agriolimacidae
Family of gastropods From Wikipedia, the free encyclopedia
Agriolimacidae is a family of small and medium-sized land slugs, or shell-less snails, terrestrial pulmonate gastropod mollusks.
| Agriolimacidae Temporal range: | |
|---|---|
| |
| The largest slug in the image is an individual of Deroceras reticulatum | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Superfamily: | Limacoidea |
| Family: | Agriolimacidae H. Wagner, 1935[2] |
| Type genus | |
| Agriolimax Mörch, 1865 | |
| Diversity[3][4] | |
| 6 genera, about 135 species (123 species in Deroceras + at least 12 other species) | |
Distribution
Distribution of Limacidae is Holarctic,[1] this include: Nearctic, western Palearctic and eastern Palearctic.[5]
Agriolimacidae is the largest slug family, some are introduced all over the world, synanthropes are often severe pests.[1]
Anatomy
Most slugs in the family Agriolimacidae are rather small; only a few (in the genera Mesolimax and Krynickillus) are larger. Most are not more than 50 mm long.[1] The mantle is usually large, occupying approximately 1/3 of the entire body length, situated in the anterior part of the body.[1] The pneumostome is clearly postmedial.[1] The surface of the mantle in living slugs is covered in concentric, mobile wrinkles.[1] In addition sometimes there is a shallow, poorly defined groove which runs above the pneumostome on the right side, not passing to the left.[1]
The penis is short, usually bag-shaped, often with external appendages, inside with different stimulatory organs.[1] No tubular membrane encircles the penis and vas deferens.[1] The penis retractor muscle is situated beside the right tentacle.[1]
In this family, the number of haploid chromosomes lies between 26 and 30 (according to the values in this table).[6]
Taxonomy
The following two subfamilies have been recognized in the taxonomy of Bouchet & Rocroi (2005):
- subfamily Agriolimacinae H. Wagner, 1935[2] – synonym: Deroceratinae Magne, 1952
- subfamily Mesolimacinae Hausdorf, 1998
Genera
Genera within the family Agriolimacidae include:
subfamily Agriolimacinae
- Deroceras Rafinesque, 1820 – type genus described as Agriolimax Mörch, 1865
- Furcopenis Castillejo & Wiktor, 1983
- Krynickillus Kaleniczenko, 1851
subfamily Mesolimacinae
- Mesolimax Pollonera, 1888
- Mesolimax brauni Pollonera, 1888
subfamily ?
- Lytopelte Boettger, 1886
- Megalopelte Lindholm, 1914
Cladogram
A cladogram showing the phylogenic relationships of this family to other families within the limacoid clade:[5]
References
External links
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